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This work describes a three-dimensional thermal finite-difference analysis of a brazing process of Vacuum Interrupters. The overall objective is to develop a reliable numerical model to be used to optimise the number of interrupters and the configuration in which these are placed within the furnace so that the process duration and cost are minimized. Significant simplification tasks are performed...
The MPBL is an effective technology in terms of heat flow transport capacity: 10 MW.m, [2],with high level adaptability. A bond graph model of such a system is proposed in this paper. The model is dynamic, qualitative, configurable and pays particular attention to the dynamic of the transient regime. It aims at being a tool dedicated to designing the different components of a MPBL. It is also used...
The ever increasing power density in high performance microelectronic devices for large business computing and telecommunication infrastructure has led to several new reliability challenges for solder interconnects. One of them is the creep collapse and bridging of ball grid array (BGA) solder joints under heatsink compressive loads. In this study, the effect of heatsinking compressive load on the...
Geothermal energy use from shallow groundwater systems is attractive for the supply of heat and hot water to buildings. It offers economic and environmental advantages over traditional fossil-fuel based technologies, in particular when large scale systems are well adapted to the always unique hydrogeological conditions. Computer based numerical simulations are used to examine the performance of multiple...
The principles, classifications and features of power cable rating models are studied in this paper,and several useful models and their applications are analyzed. Especially SCR cable model, DCR cable model and a synthetic analysis approach are introduced, which could be used for design, online monitoring and optimization of cable systems. An application case is provided.
The grind-hardening is a new type of surface modification technology, which utilizes the dissipated grinding heat for hardening the surface layer of the workpiece. Currently, most of the researchers studying the grind-hardening have used design of experiments approach, by varying grind-hardening processes parameters with a great deal of experiments which has significant degree of uncertainty of the...
Building on the extensive research in Virtual Reality (VR), we are proposing a new dynamic prototype for modelling and simulating carbon emissions in a virtual village called VIRVIL. VIRVIL is a simulated settlement for the assessment of the impact of low and zero carbon technologies and measures in the built environment. The prototype will focus on the impact on the community as a whole, as well...
A physical yet analytical phase change memory (PCM) model simultaneously accounting for thermal and electrical conductivities is presented. Due to the physics based nature of the model, the essential temperature from heating and cooling of PCM during operation is instantaneously updated. More importantly, the model can be applied to non-conventional circuit design technique. We show that for the first...
Pulsed wire discharge in embedded-gas is a simple and efficient method for producing nanosize powder of metal, alloy, or metal compound. The powder size and size distribution are strongly related to the deposition energy into the wire load by joule heating. This paper established a numerical model to analyze and predict the behavior of electrical circuits containing pulsed current source and exploding...
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